ML20136G421
| ML20136G421 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/05/1985 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Jeffery Griffin ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 8508190392 | |
| Download: ML20136G421 (3) | |
Text
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August 5, 1985 Docket No. 50-313 DISTRIBUTION ASingh AC S-1 L POR RIngram Mr. John Griffin ORB #4 Rdg GVissing i
Senior Vice President HThompson Gray File of Energy Supply OELD EBlackwood Arkansas Power and Light Company Edordan H0rnstein P. O. Box 551 BGrimes DDilanni
~
Little Rock, Arkansas 72203
Dear Mr. Griffin:
The NRC staff is in the process of developing a policy regarding " flooding of safety equipment compartments by backflow through floor drains" which we have designated as Generic Issue 77. We are contacting several utilities to seek their voluntary assistance by responding to the enclosed questions. This letter confirms Arkansas Power and Light Company's voluntary participation in this effort with respect to Arkansas Nuclear One, Unit 1, as discussed with you by teleconference.
The purpose of this letter is to request that you review the enclosed questions and confirm your continued willingness to assist us in the resolution of this generic issue.
In order that we might develop our program schedule as soon as i
possible, please inform us within 30 days of receipt of this letter whether you can continue to support the program and, if so, when you can respond to the en-closed questions. We would, however, expect your response date to the questions not to exceed 120 days from the date of your response of this letter.
OMB Clearance is not required for this request since it is being transmitted to fewer than 10 addressees.
i Sincerely,
.g Jun ?. nw :
John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing
Enclosure:
As stated cc w/ enclosure:
See next page OR8 p/ OR6
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8508190392 850005 PDR ADOCK 05000313 P PDR
a Mr. J. M. Griffin Arkansas Power & Light Company Arkansas Nuclear One, Unit I cc: Mr. J. Ted Enos, Manager Licensing Arkansas Power & Light Company ~ P. O. Box 551 Little Rock, Arkansas 72203 Mr. James M. Levine, General Manager Arkansas Nuclear One P. O. Box 608 Russellville, Arkansas 72801 Mr.. Nicholas S. Reynolds Bishop. Liberman, Cook, Purcell & Reynolds 1200 Seventeenth Street, NW Washington, D.C. 20036 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 Resident Inspector U.S. Nuclear Regulatory Commission P. O. Box 2090 Russellville, Arkansas 72801 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Office of Executive Director for Operations 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Mr. Frank Wilson, Director Division of Environmental Health Protection Department of Health Arkansas Department of Health 4815 West Markham Street Little Rock, Arkansas 72201 Honorable Ermil Grant Acting County Judge of Pope County Pope County Courthouse Russellville, Arkansas 72801
o REQUEST FOR INFORMATION GENERIC ISSUE 77 4 1. Provide a detailed discussion of the equipment and floor drainge system (s) which serve safety-related equipment or compartments cot taining safety-related equipment or compartments. Include diagrams as appropriate. As part of the discussion, describe the features which will prevent back-flow from any area into compartments containing safety-related equipment. This discussion should include the drainage system and any other compart-ment openings such as doors, unsealed penetrations of grating through which fluid may flow. Sources of fluid to be considered are external flooding (ground water seepage, surface influence from rivers, lakes and rain fall ponding) and flooding due to tank failures and pipe breaks including failure of the expansion joints in the circulating water system. The back- . flowing fluids to be considered are water, steam and hot air. Confirm for those conditions ' identified above and that redundant safety-related equip-ment will not be adversely affected by fluid ingress into the equipment compartments. ~ - ' 2. Describe the design basis for sizing the equipment and floor drainage systems and the means for assuring that they can effectively handle the maximum leakage flow conditions in the specific plant areas of concern housing redundant safety-related equipment. 3. Indicate any past incidents of drainage system backflow or other concern for failure of redundant safety-related equipment that has arisen or been postulated in the past due to a fluid leak or harsh environment in safety-related equipment areas. e 0 e I -=
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